Variable step-size FxLMS algorithm implementation for active vibration control of piezoelectric intelligent blade based on ZYNQ

Implementation of a new Variable Step-Size Filter-x Least Mean Square (VSS-FxLMS) algothrim is carried out for a piezoelectric intelligent blade active vibration control system based on ZYNQ7020. Four Macro Fiber Composite (MFC) patches are attached on the piezoelectric blade. Two are acted as piezoelectric actuators, attached at the center and root of the blade. The other two are used as piezoelectric sensors, attached near the piezoelectric actuators. Then, ZYNQ is used as the main controller, and variable step-size strategy is employed to achieve superior convergence performance than fixed step-size. Comparing with FxLMS, the proposed VSS-FXLMS algorithm has faster convergence rate and smaller steady-state error. Finally, several active vibration control experiments are conducted on the piezoelectric intelligent blade, and the results verify that the proposed algorithm has a better performance of the blade vibration suppression.